Control method and system of hot-rolled steel plate shot blasting unit and steel plate heat treatment production line

Abstract

The present invention discloses a control method, system and steel plate heat treatment production line for a hot-rolled steel plate shot blasting machine. The control method of the hot-rolled steel plate shot blasting machine comprises: judging whether the automatic operation preparation conditions of the machine are met, and if so, executing the following steps: sending steel plate information to a first suction cup crane; judging whether there is a steel plate on the machine roller, when there is no steel plate on the machine roller, the first suction cup crane places the adsorbed steel plate on the first roller, and automatically returns to the loading area after placing the plate; receiving the inserted steel plate information transmitted by the first suction cup crane, after receiving the inserted steel plate information transmitted by the first suction cup crane, controlling the first roller, the shot blasting roller and the second roller to run according to the first speed set by each, controlling the shot blasting machine based on the set shot blasting speed and the real-time position of the steel plate, and controlling the flow rate and speed of the shot blasting. The present invention can improve the production efficiency of the machine and the safety and stability of the machine.

Description

Technical Field

[0001] The invention belongs to the technical field of heat treatment control, and in particular relates to a control method and system for a hot-rolled steel plate shot blasting unit and a steel plate heat treatment production line. Background Art

[0002] In the heat treatment process, heat treatment of steel plates is a key process step used to improve the strength, corrosion resistance and surface quality of steel plates. Shot blasting is an important sub-process, which removes dirt, oxides and other undesirable substances on the surface of steel plates by spraying high-speed flowing metal particles or abrasives. However, there are some problems with the traditional control method of shot blasting units, including excessive reliance on manual operation.

[0003] And in the heat treatment process, the steel plate needs to be sent to the quenching furnace according to the process speed. The temperature of the quenching furnace is relatively high, generally around 900 degrees. Therefore, the steel plate inside is in the red steel state from the entrance to the exit of the quenching furnace. Then, when the steel plate is out of the furnace, the quenching machine behind needs to spray water to quench the steel plate. The furnace roller of the quenching furnace is in the furnace for a long time. To ensure its roller shape, it must rotate all the time. The quenching machine may not discharge water due to various reasons. Under various factors, if it is not properly controlled, it is very easy to cause red steel to come out, which will cause unqualified products, and even endanger equipment and personal safety, causing equipment damage and personal injury, with very serious consequences.

[0004] In the heat treatment process, the steel plate needs to be shot blasted first, and then sent into the quenching furnace according to the process speed. The temperature of the quenching furnace is relatively high, generally around 900 degrees. Therefore, the steel plate inside is in a red steel state from the entrance to the exit of the quenching furnace. Then, when the steel plate is out of the furnace, the quenching machine behind it needs to spray water to quench the steel plate.

[0005] When the steel plate leaves the shot blasting machine, it is very easy to be attached with the shot, so a blowing device is added at its outlet to blow the shot off.

[0006] When the steel plate enters the furnace, it will bring air into the furnace, affecting the atmosphere in the furnace, thereby affecting the product quality and the service life of the furnace. Therefore, a blowing device is added at the entrance to prevent too much air from entering the furnace.

[0007] When the steel plate leaves the quenching machine, it is very easy to be attached with water droplets, so a blowing device is added at its outlet to blow off the water droplets.

[0008] The traditional method of controlling the blowing device is to let the blowing device blow all the time, which wastes compressed air extremely and causes a waste of energy. Summary of the invention

[0009] The object of the present invention is to overcome at least one defect in the prior art and to provide a control method and system for a hot-rolled steel plate shot blasting unit and a steel plate heat treatment production line.

[0010] The technical solution of the present invention is implemented as follows: The present invention discloses a control method for a hot-rolled steel plate shot blasting unit, comprising:

[0011] Determine whether the unit meets the automatic operation preparation conditions. If so, perform the following steps:

[0012] Send the steel plate information to the first suction cup crane;

[0013] Determine whether there is a steel plate on the roller of the unit, wherein the roller of the unit includes a first roller, a shot blasting roller and a second roller, the feeding end of the shot blasting roller is connected to the first roller, and the discharging end of the shot blasting roller is connected to the second roller;

[0014] When there is no steel plate on the roller table of the unit, a first control instruction is output to the first suction cup crane, and the first control instruction is configured to, when executed, enable the first suction cup crane to place the adsorbed steel plate on the first roller table, and automatically return to the loading area after placing the plate;

[0015] Receive the inserted steel plate information transmitted by the first suction cup crane, and after receiving the inserted steel plate information transmitted by the first suction cup crane, output the second control instruction to the first roller, the shot blasting roller, and the second roller, and output the third control instruction containing the set shot blasting speed and the real-time position of the steel plate to the shot blasting machine, the second control instruction is configured to, when executed, make the first roller, the shot blasting roller, and the second roller run at their respective set first speeds, and the third control instruction is configured to, when executed, make the shot blasting machine control the flow rate and speed of the shot blasting based on the set shot blasting speed and the real-time position of the steel plate.

[0016] Furthermore, the automatic operation preparation conditions of the unit include that the steel plate parameters have been entered, the first roller, the shot blasting roller, the second roller drive are ready, the first suction cup crane is in automatic mode, and the shot blasting machine is in automatic mode.

[0017] Further, when it is recognized that the steel plate reaches the set position on the second roller, the second roller is controlled to stop, and the data information of the steel plate is sent to the second suction cup crane;

[0018] After receiving the data information of the steel plate sent by the unit controller, the second suction cup crane automatically moves to the set position to absorb the steel plate on the second roller and then places it in the finished product area.

[0019] Furthermore, when the second suction cup crane absorbs the steel plate and leaves the second roller a set distance, it will send feedback information to the unit controller. After receiving the feedback information sent by the second suction cup crane, the unit controller will delete the signal of the steel plate and return to the initial state.

[0020] Further, when it is identified that the tail of the steel plate leaves the shot blasting area, the second roller is controlled to accelerate to a set second speed;

[0021] or / and,

[0022] When the first suction cup crane places the adsorbed steel plate on the first roller and leaves the first roller by a set distance, the first suction cup crane transmits the steel plate insertion information to the unit controller;

[0023] or / and,

[0024] The first suction cup crane receives the steel plate information sent by the unit controller and absorbs the steel plate from the loading area;

[0025] or / and,

[0026] When there are steel plates on the roller table of the unit, the first suction cup crane continues to wait in the loading area;

[0027] or / and,

[0028] When there is no steel plate on the roller table of the unit, the first roller table, the shot blasting roller table and the second roller table are stopped.

[0029] The present invention also discloses a control system for a hot-rolled steel plate shot blasting unit, including a unit controller, wherein the unit controller is provided with a control program for the hot-rolled steel plate shot blasting unit, and the control program for the hot-rolled steel plate shot blasting unit is configured to implement the control method for the hot-rolled steel plate shot blasting unit as described above.

[0030] Furthermore, the control system of the hot-rolled steel plate shot blasting unit of the present invention also includes a first roller frequency converter, a shot blasting roller frequency converter and a second roller frequency converter, the first roller frequency converter and the second roller frequency converter are connected to the unit controller, the shot blasting roller frequency converter is connected to the shot blasting machine controller, the shot blasting machine controller is connected to the unit controller, the first roller frequency converter is connected to the first roller motor, the second roller frequency converter is connected to the second roller motor, and the shot blasting roller frequency converter is connected to the shot blasting roller motor.

[0031] Furthermore, the control system of the hot-rolled steel plate shot blasting machine unit of the present invention further comprises a suction cup crane controller for controlling the suction cup crane, and the suction cup crane controller is connected to the unit controller.

[0032] The present invention also discloses a steel plate heat treatment production line, comprising a unit controller, a shot blasting machine, a first suction cup crane, and a first roller, a shot blasting roller, and a second roller arranged in sequence. The unit controller is provided with a control program of the hot-rolled steel plate shot blasting unit, and the control program of the hot-rolled steel plate shot blasting unit is configured to implement the control method of the hot-rolled steel plate shot blasting unit as described above.

[0033] Furthermore, the steel plate heat treatment production line of the present invention further comprises a quenching furnace and / or a second suction cup crane and a steel plate detection device, wherein the quenching furnace is arranged at the discharge end of the second roller conveyor, and the shot-blasted steel plate is transported to the quenching furnace through the second roller conveyor;

[0034] The steel plate detection device is used to identify whether the steel plate has reached the set position on the second roller. When it is identified that the steel plate has reached the set position on the second roller, the unit controller is used to control the second roller to stop and send data information of the steel plate to the second suction cup crane;

[0035] The second suction cup crane is used to receive the data information of the steel plate sent by the unit controller, automatically run to the set position to absorb the steel plate on the second roller and then place it in the finished product area;

[0036] When the second suction cup crane absorbs the steel plate and leaves the second roller table a set distance, it will send feedback information to the unit controller. After receiving the feedback information sent by the second suction cup crane, the unit controller will delete the signal of the steel plate and return to the initial state.

[0037] The present invention has at least the following beneficial effects:

[0038] The invention has a high degree of automation, reduces manual intervention and improves production efficiency.

[0039] The invention enhances the stability and consistency of process parameters and improves product quality.

[0040] The invention realizes fully automated production and reduces resource waste, such as consumption of abrasives and energy.

[0041] The present invention provides comprehensive data logging and analysis capabilities to aid process optimization and predict maintenance needs.

[0042] In summary, the shot blasting unit control scheme of the present invention has brought significant improvements to the steel plate heat treatment process in the metallurgical industry, improving efficiency, quality and sustainability. Through the application of modern automation technology, it can better meet market demand, reduce production costs and enhance competitiveness. The implementation of this patent will have a far-reaching impact on the metallurgical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1A schematic diagram of a control system of a hot-rolled steel plate shot blasting machine provided in an embodiment of the present invention;

[0045] Figure 2 A flow chart of a control method for a hot-rolled steel plate shot blasting unit provided by an embodiment of the present invention;

[0046] Figure 3 A schematic diagram of the arrangement of a blowing device for a steel plate heat treatment production line provided in an embodiment of the present invention;

[0047] Figure 4 A schematic diagram of the arrangement of steel plate detection elements of a steel plate heat treatment production line provided by an embodiment of the present invention;

[0048] Figure 5 A flow chart of a method for controlling the entry and exit of steel plates into a furnace provided by an embodiment of the present invention;

[0049] Figure 6 A schematic diagram of the position coordinates of a heat treatment unit provided by an embodiment of the present invention;

[0050] Figure 7 A schematic diagram of a steel plate entering a furnace is provided in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "multiple" and "several" mean two or more.

[0054] Embodiment 1

[0055] See also Figure 1 and Figure 2 The embodiment of the present invention discloses a control method of a hot-rolled steel plate shot blasting unit, comprising:

[0056] Determine whether the unit meets the automatic operation preparation conditions. If so, perform the following steps:

[0057] Send the steel plate information to the first suction cup crane;

[0058] Determine whether there is a steel plate on the roller of the unit, wherein the roller of the unit includes a first roller, a shot blasting roller and a second roller, the feeding end of the shot blasting roller is connected to the first roller, and the discharging end of the shot blasting roller is connected to the second roller;

[0059] When there is no steel plate on the roller of the unit (for safety, there is no steel plate on the first roller, the shot blasting roller and the second roller), a first control instruction is output to the first suction cup crane. The first control instruction is configured to, when executed, cause the first suction cup crane to place the adsorbed steel plate on the first roller, and automatically return to the loading area after placing the plate;

[0060] Receive the inserted steel plate information transmitted by the first suction cup crane, and after receiving the inserted steel plate information transmitted by the first suction cup crane, output the second control instruction to the first roller, the shot blasting roller, and the second roller, and output the third control instruction containing the set shot blasting speed and the real-time position of the steel plate to the shot blasting machine, the second control instruction is configured to, when executed, make the first roller, the shot blasting roller, and the second roller run at their respective set first speeds, and the third control instruction is configured to, when executed, make the shot blasting machine control the flow rate and speed of the shot blasting based on the set shot blasting speed and the real-time position of the steel plate.

[0061] The steel plate is transported in sequence through the first roller, the shot blasting roller and the second roller.

[0062] Furthermore, the automatic operation preparation conditions of the unit include that the steel plate parameters have been entered, the first roller, the shot blasting roller, the second roller drive are ready, the first suction cup crane is in automatic mode, and the shot blasting machine is in automatic mode.

[0063] Further, when it is recognized that the steel plate reaches the set position on the second roller, the second roller is controlled to stop, and the data information of the steel plate is sent to the second suction cup crane;

[0064] After receiving the data information of the steel plate sent by the unit controller, the second suction cup crane automatically moves to the set position to absorb the steel plate on the second roller and then places it in the finished product area.

[0065] Furthermore, when the second suction cup crane absorbs the steel plate and leaves the second roller a set distance, it will send feedback information to the unit controller. After receiving the feedback information sent by the second suction cup crane, the unit controller will delete the signal of the steel plate and return to the initial state.

[0066] The discharging end of the second roller conveyor is connected to the quenching furnace, and the shot-blasted steel plate is transported to the quenching furnace through the second roller conveyor.

[0067] Further, when it is identified that the tail of the steel plate leaves the shot blasting area, the second roller is controlled to accelerate to a set second speed. Only the second roller is accelerated, and the speed of the shot blasting roller is the process speed of shot blasting.

[0068] In some embodiments, when the first suction cup crane places the adsorbed steel plate on the first roller and leaves the first roller a set distance, the first suction cup crane transmits the steel plate insertion information to the unit controller.

[0069] In some embodiments, the first suction cup crane receives the steel plate information sent by the unit controller and absorbs the steel plate from the loading area.

[0070] In some embodiments, when there is a steel plate on the roller of the machine unit, the first suction cup crane is made to continue to wait in the loading area. In this embodiment, when there is a steel plate on any of the first roller, the shot blasting roller and the second roller, the first suction cup crane is made to continue to wait in the loading area.

[0071] In some embodiments, when there is no steel plate on the roller table of the machine unit, the first roller table, the shot blasting roller table, and the second roller table are stopped.

[0072] The above process is described in detail below through a specific example.

[0073] This embodiment discloses a control method for a hot-rolled steel plate shot blasting unit, comprising the following steps:

[0074] Conditions for automatic operation of the unit:

[0075] a. The steel plate parameters have been entered: including the length, thickness, width, number of steel plates, shot blasting speed and other information;

[0076] b. No. 1 and No. 2 suction cup cranes are in automatic mode, and the shot blasting machine is in automatic mode;

[0077] c. The feeding roller, shot blasting roller and the second roller drive are ready;

[0078] d, the unit is in remote mode;

[0079] After the unit starts automatically, the following actions are performed:

[0080] a. 1# suction cup crane receives the information of steel plate from the unit controller;

[0081] b. No. 1 suction cup crane will suck up a steel plate from the loading area;

[0082] c. The 1# suction cup crane will act according to whether there are steel plates on the first roller, shot blasting roller, and second roller:

[0083] If there are steel plates, the 1# suction cup crane will continue to wait in the loading area;

[0084] If there is no steel plate, the 1# suction cup crane will go to the top of the first roller and place the steel plate on the first roller. After placing the plate normally, the 1# suction cup crane will leave the first roller and go to the loading area. When it leaves the first roller for about 100mm, its controller will transmit the information of inserting the steel plate to the unit controller.

[0085] d. After the unit controller receives the steel plate information inserted by the 1# suction cup crane, the unit will run the first roller, shot blasting roller and second roller at the required speed; at the same time, the unit controller will send the required shot blasting speed and the real-time position of the steel plate to the shot blasting controller, so that the shot blasting controller can control the flow and speed of the shot blasting;

[0086] e. When the steel plate runs normally, when its tail leaves the shot blasting area, it will accelerate to the maximum speed of the roller and then position its head on the second roller. When the position is reached, the second roller will stop. At this time, the unit controller will send data information of the steel plate to the 2# suction cup;

[0087] f. After receiving the information, the 2# suction cup crane will automatically move to the top of the steel plate and adsorb it, and then move to the finished product area. After it is adsorbed normally and leaves the second roller table 100mm, it will send information to the unit controller. At this time, the unit controller will delete the signal of the steel plate and return to the initial state;

[0088] Follow the above steps in a cycle to achieve fully automatic production.

[0089] Based on the same inventive concept, the present invention also discloses a control device for a hot-rolled steel plate shot blasting unit, comprising: a memory, a processor, and a heat treatment unit steel plate out-of-furnace control program stored in the memory and executable on the processor, wherein the heat treatment unit steel plate out-of-furnace control program is configured to implement the control method for the hot-rolled steel plate shot blasting unit as described above.

[0090] In some embodiments, the processor may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip. The processor is generally used to control the overall operation of the electronic device. In this embodiment, the processor is used to run the program code or process data stored in the memory, such as the program code of the control method of the hot rolled steel plate shot blasting machine group.

[0091] Based on the same inventive concept, the present invention also discloses a storage medium, which stores a heat treatment unit steel plate discharge control program, and the heat treatment unit steel plate discharge control program is used to enable the processor to implement the control method of the hot rolled steel plate shot blasting unit as described above when executing.

[0092] The memory includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, disk, optical disk, etc. In some embodiments, the memory can be an internal storage unit of the electronic device, such as a hard disk or memory of the electronic device. In other embodiments, the memory can also be an external storage device of the electronic device, such as a plug-in hard disk equipped on the electronic device, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), etc. Of course, the memory can also include both the internal storage unit of the electronic device and its external storage device. In this embodiment, the memory is generally used to store the operating method and various application software installed in the electronic device, such as the program code of the control method of the hot-rolled steel plate shot blasting machine group, etc. In addition, the memory can also be used to temporarily store various types of data that have been output or are to be output.

[0093] Embodiment 2

[0094] The present invention also discloses a control system for a hot-rolled steel plate shot blasting unit, including a unit controller, wherein the unit controller is provided with a control program for the hot-rolled steel plate shot blasting unit, and the control program for the hot-rolled steel plate shot blasting unit is configured to implement the control method for the hot-rolled steel plate shot blasting unit as described in Example 1.

[0095] Furthermore, the control system of the hot-rolled steel plate shot blasting unit of the present invention also includes a first roller frequency converter, a shot blasting roller frequency converter and a second roller frequency converter, the first roller frequency converter and the second roller frequency converter are connected to the unit controller, the shot blasting roller frequency converter is connected to the shot blasting machine controller, the shot blasting machine controller is connected to the unit controller, the first roller frequency converter is connected to the first roller motor, the second roller frequency converter is connected to the second roller motor, and the shot blasting roller frequency converter is connected to the shot blasting roller motor.

[0096] Furthermore, the control system of the hot-rolled steel plate shot blasting unit of the present invention further comprises a first suction cup crane controller for controlling a first suction cup crane, and the first suction cup crane controller is connected to the unit controller.

[0097] Furthermore, the control system of the hot-rolled steel plate shot blasting unit of the present invention further comprises a second suction cup crane controller for controlling a second suction cup crane, and the second suction cup crane controller is connected to the unit controller.

[0098] Furthermore, the control system of the hot-rolled steel plate shot blasting machine of the present invention further comprises a field IO station and a field operation box. The field IO station is connected to the machine controller, and the field IO station is connected to the field operation box. The field operation box is provided with a command input device, and the command input device is used for a user to operate and input a control command to the machine controller.

[0099] Furthermore, the control system of the hot rolled steel plate shot blasting machine of the present invention further comprises an operation station, which is connected to the machine controller. The operation station is provided with a computer, which has a user interface, providing an interface for operators to interact with the system, so that they can monitor real-time process parameters, make manual adjustments, or set new process parameters.

[0100] Furthermore, the control system of the hot-rolled steel plate shot blasting unit of the present invention also includes a data acquisition and analysis system, which is connected to the unit controller. The data acquisition and analysis system is used to record key process data in real time and provide historical data for analysis and optimization. This helps to improve process control and predict maintenance needs. The unit controller is the control unit of the system, which is responsible for handling the motion control of each device and automatically adjusting the operation of the shot blasting unit.

[0101] The present invention provides a production process control system for a hot-rolled steel plate shot blasting unit, including the control of a fully automatic process from inlet loading to shot blasting and then to unloading. The present invention relates to a control system for a shot blasting unit for heat treatment of steel plates in the metallurgical industry, the system is intended to improve the efficiency of the shot blasting unit treatment and ensure the stability of production. The control system utilizes modern automation technology, can achieve comprehensive monitoring, automatic control and data recording, and provides an advanced method for managing the operation of the shot blasting unit.

[0102] The control system of the present invention can improve the production efficiency, safety and stability of the unit.

[0103] Embodiment 3

[0104] The present invention also discloses a steel plate heat treatment production line, comprising a unit controller, a shot blasting machine, a first suction cup crane, and a first roller, a shot blasting roller, and a second roller arranged in sequence. The unit controller is provided with a control program of the hot-rolled steel plate shot blasting unit, and the control program of the hot-rolled steel plate shot blasting unit is configured to implement the control method of the hot-rolled steel plate shot blasting unit as described in Example 1.

[0105] The first suction cup crane moves according to whether there are steel plates on the first roller, shot blasting roller and second roller.

[0106] In some embodiments, the steel plate heat treatment production line of the present invention further comprises a quenching furnace, wherein the quenching furnace is arranged at the discharge end of the second roller conveyor, and the shot-blasted steel plate is transported to the quenching furnace through the second roller conveyor;

[0107] In some embodiments, the steel plate heat treatment production line of the present invention further includes a second suction cup crane and a steel plate detection device, wherein the steel plate detection device is used to identify whether the steel plate has reached a set position on the second roller conveyor, and when it is identified that the steel plate has reached the set position on the second roller conveyor, the unit controller is used to control the second roller conveyor to stop and send data information of the steel plate to the second suction cup crane;

[0108] The second suction cup crane is used to receive the data information of the steel plate sent by the unit controller, automatically run to the set position to absorb the steel plate on the second roller and then place it in the finished product area;

[0109] When the second suction cup crane absorbs the steel plate and leaves the second roller table a set distance, it will send feedback information to the unit controller. After receiving the feedback information sent by the second suction cup crane, the unit controller will delete the signal of the steel plate and return to the initial state.

[0110] The steel plate heat treatment production line of the present invention can only store the steel plates after shot blasting. Of course, the present invention can also directly send the steel plates after shot blasting to the quenching furnace, or send the steel plates after shot blasting to the finished product area through the second suction cup as needed. The steel plates in the finished product area can also be sent to the second roller conveyor through the second suction cup conveyor, and the steel plates are sent to the quenching furnace through the second roller conveyor.

[0111] In some embodiments, the steel plate is very likely to be attached with the shot when leaving the shot blasting machine, so a blowing device is added to the outlet to blow off the shot.

[0112] A first blowing device is located between the shot blasting roller and the second roller of the shot blasting machine, and the first blowing device is connected to the unit controller. The unit controller is provided with a control program for the blowing device, and the control program of the blowing device is configured to implement the control method of the blowing device as described in Example 4.

[0113] In some embodiments, when the steel plate enters the furnace, the steel plate will bring air into the furnace, affecting the atmosphere in the furnace, thereby affecting the product quality and the service life of the furnace, so a blowing device is added at the entrance to prevent excessive air from entering the furnace. The second blowing device is located between the second roller and the entrance of the quenching furnace, and the second blowing device is connected to the unit controller, and the unit controller is provided with a control program of the blowing device, and the control program of the blowing device is configured to implement the control method of the blowing device as described in Example 4.

[0114] In some embodiments, the steel plate heat treatment production line further includes a furnace exit roller and a quenching machine, wherein the quenching machine is located between the quenching furnace outlet and the furnace exit roller.

[0115] In some embodiments, when the steel plate leaves the quenching machine, it is very easy to be attached with water droplets, so a blowing device is added at its outlet to blow off the water droplets. The third blowing device is located between the quenching machine and the furnace roller, and the third blowing device is connected to the unit controller, and the unit controller is provided with a control program of the blowing device, and the control program of the blowing device is configured to implement the control method of the blowing device as described in the fourth embodiment.

[0116] In some embodiments, a steel plate out-of-furnace detection element is arranged in front of the quenching furnace outlet, and the steel plate out-of-furnace detection element is connected to the unit controller. The steel plate out-of-furnace detection element is used to transmit the detected information to the unit controller. The unit controller is provided with a steel plate out-of-furnace control program, and the steel plate out-of-furnace control program is configured to implement the steel plate out-of-furnace control method as described in Example 5.

[0117] In some embodiments, a steel plate entering the furnace detection element is arranged in front of the entrance of the quenching furnace, and the steel plate entering the furnace detection element is connected to the unit controller. The steel plate entering the furnace detection element is used to transmit the detected information to the unit controller. The unit controller is provided with a steel plate entering the furnace control program, and the steel plate entering the furnace control program is configured to implement the steel plate entering the furnace control method as described in Example 6.

[0118] Embodiment 4

[0119] An embodiment of the present invention provides a control method for a blowing device, comprising the following steps:

[0120] Obtain the number n of steel plates of the unit (such as obtaining the number n of steel plates of the entire heat treatment unit);

[0121] Determine whether n is 0;

[0122] If n=0, the mark position corresponding to the blowing device is set to the first value;

[0123] If n>0, the loop is started: the loop variable i=1 is initialized, and it is determined whether the position of the i-th steel plate meets the first condition, which is that the tail position of the steel plate - B ≤ the position of the blowing device ≤ the head position of the steel plate + B, where B is the set allowable deviation value (B is set according to actual needs);

[0124] If the position of the i-th steel plate does not meet the first condition, determine whether i is less than n. If not, set the flag position corresponding to the blowing device to the first value and exit the loop. If yes, then i+1 is added to continue the determination of the next steel plate.

[0125] If the position of the i-th steel plate meets the first condition, the mark position corresponding to the blowing device is set to the second value, and the cycle ends;

[0126] When the flag bit corresponding to the blowing device is the second value, the blowing device is controlled to start;

[0127] When the flag bit corresponding to the blowing device is the first value, the blowing device is controlled to stop.

[0128] In some embodiments, B is generally the deviation of the operating length, within 500 mm.

[0129] The present invention can calculate the position of each steel plate by tracking the data block. The position information of each steel plate (the head and tail position of the steel plate) is calculated by a program. For example, the initial position of each steel plate is known, and the position corresponding to the time is obtained by integrating the speed and time. Of course, this position is theoretical, and the calculated position can also be corrected by a grating.

[0130] In some embodiments, see Figure 6 The position value increases gradually along the transmission direction of the steel plate. One end of the steel plate along its transmission direction is the head end, and the other end is the tail end.

[0131] In some embodiments, the first value is 0, or / and, and the second value is 1.

[0132] In some embodiments, the control method of the blowing device of the heat treatment unit of the present invention also includes the following steps: defining each blowing device according to the coordinates, specifically including: defining the position coordinates of each blowing device to spray[1..m]:DINT, m is the number of blowing devices.

[0133] In some embodiments, the control method of the blowing device of the heat treatment unit of the present invention also includes the following steps: configuring the flag bit and output point corresponding to each blowing device, when the flag bit corresponding to the blowing device is the second value, the output point corresponding to the blowing device outputs a set signal for controlling the start of the blowing device, and when the flag bit corresponding to the blowing device is the first value, the output point corresponding to the blowing device outputs a reset signal for controlling the stop of the blowing device.

[0134] The control method of the injection device of the heat treatment unit is stable and reliable, and has the characteristics of stability, safety, versatility, and can reduce investment costs (no need to install gratings), high program code execution efficiency, and low resource usage.

[0135] The above process is described in detail below through a specific example.

[0136] See also Figure 3 A first blowing device is arranged between the shot blasting roller of the shot blasting machine and the furnace entry roller, a second blowing device is arranged between the furnace entry roller and the entrance of the quenching furnace, and a third blowing device is arranged between the quenching machine and the furnace exit roller.

[0137] In some embodiments, a spray valve is arranged at the exit of the shot blasting machine, the entrance of the furnace, and the exit of the quenching machine, respectively. The valve is controlled by a PLC controller, and the valve is connected to the output module of the controller. There is no need to arrange a steel plate detection device before and after the valve, and the PLC automatically controls it according to the position of the steel plate.

[0138] The above process is described in detail below through a specific example.

[0139] The first blowing device, i.e., the blowing valve, is arranged between the shot blasting roller of the shot blasting machine and the furnace roller, the second blowing device, i.e., the blowing valve, is arranged between the furnace roller and the entrance of the quenching furnace, and the third blowing device, i.e., the blowing valve, is arranged between the quenching machine and the furnace roller. The valve is controlled by the PLC controller, and the valve is connected to the output module of the controller. There is no need to arrange a steel plate detection device before and after the valve, and the PLC automatically controls it according to the position of the steel plate.

[0140] The control method of the blowing device provided in this specific embodiment specifically includes:

[0141] 1) Define the spray device position coordinates to spray[1..3]: DINT;

[0142] The position coordinate of the spray device at the shot blasting outlet is spray[1]:=89000. This value may vary depending on the specific situation.

[0143] The position coordinates of the spray device at the furnace entrance are spray[2]:=110000. This value may vary depending on the specific situation.

[0144] The position coordinates of the spray device at the quenching machine outlet are spray[3]:=310000. This value may vary depending on the specific situation.

[0145] Output point:

[0146] The switch of the blowing device at the shot blasting outlet is Q1.0;

[0147] The switch of the blowing device at the furnace entrance is Q1.1;

[0148] The switch of the blowing device at the outlet of the quenching machine is Q1.2;

[0149] Output points: Q1.0, Q1.1, Q1.2 can be adjusted according to specific circumstances.

[0150] Flags:

[0151] The switch of the shot blasting device at the outlet is set_flag[1];

[0152] The switch of the blowing device at the furnace entrance is set_flag[2];

[0153] The switch of the blowing device at the outlet of the quenching machine is set_flag[3];

[0154] 2) The following is the control description of the flag set_flag[1]:

[0155] Get the number of steel plates n of the unit,

[0156] If n=0, the number of steel plates at this blowing device position is 0, and the flag bit set_flag[1]=0;

[0157] If n>0, start the loop: initialize the loop variable i=1, first determine whether the position of the i-th steel plate meets the following conditions: the tail position of the steel plate -1000 < the shot blasting outlet is spray[1] < the head position of the steel plate +1000. If this condition is not met, first determine whether i is less than n. If not, exit the loop, set the flag bit set_flag[1]=0. If i is less than n, then i=i+1, and continue to determine the next steel plate.

[0158] If the position of the i-th steel plate satisfies: the tail position of the steel plate -1000 < spray[1] at the shot blasting exit < the head position of the steel plate +1000, then return to the loop, and set flag bit set_flag[1] = 1;

[0159] 3) The switch of the shot blasting device at the outlet is Q1.0. Control instructions:

[0160] If set_flag[1]=1, Q1.0 is set, and the blowing device is started;

[0161] If set_flag[1]=0, Q1.0 is reset, and the blowing device stops.

[0162] The control method of the spray device of the heat treatment unit proposed by the present invention can effectively prevent the residual shot blasting on the steel plate, prevent the steel plate from bringing in oxygen, and prevent the residual moisture on the steel plate, thereby improving the production efficiency of the unit and the safety and stability of the unit. The present invention has a significant effect after being put into use, which can greatly reduce the workload of maintenance personnel, and at the same time accurately reduces the investment in the project.

[0163] Embodiment 5

[0164] See also Figure 4 and Figure 5 The embodiment of the present invention provides a method for controlling a steel plate to be discharged from a furnace, comprising the following steps:

[0165] Acquire the signal of the out-of-furnace steel plate detection element;

[0166] When the steel plate detection element detects a steel signal, it searches for a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the steel plate detection element ≤ the head position of the steel plate + A, where A is the set allowable deviation value;

[0167] If a steel plate that meets the first condition is found, the search is exited, a normal signal is returned (indicating that the signal of the steel plate detection element is normal), and the furnace discharge procedure is started;

[0168] If no steel plate that meets the first condition is found, an abnormal signal is returned and an alarm is issued to indicate an abnormality. For example, the position of the steel plate or the steel plate detection element may be abnormal, and the furnace is stopped.

[0169] Furthermore, when the out-of-furnace steel plate detection element detects the presence of steel signal, signal processing is performed, generally delaying for a set time (such as 1 second).

[0170] Furthermore, the out-of-furnace steel plate detection element is arranged before the exit of the quenching furnace (heating furnace) and close to the exit of the quenching furnace (heating furnace).

[0171] Furthermore, the out-of-furnace steel plate detection element is a (reverse-beam grating).

[0172] The position information of each steel plate (the head and tail positions of the steel plate) is calculated by the program. For example, the initial position of each steel plate is known, and its position at the corresponding time is obtained by integrating the speed and time. Of course, this position is theoretical, and the calculated position can also be corrected by the grating.

[0173] In some embodiments, the distance between the out-of-furnace steel plate detection element and the quenching furnace outlet is set as required, generally 1 to 3 meters, and not less than 1 meter, that is, the out-of-furnace steel plate detection element is located 1 to 3 meters in front of the quenching furnace outlet, and not less than 1 meter. In some embodiments, A is generally 1 to 1.5 meters.

[0174] In some embodiments, there are multiple out-of-furnace steel plate detection elements, which are spaced apart along the out-of-furnace steel plate direction. The spacing between adjacent out-of-furnace steel plate detection elements is set as required.

[0175] In some embodiments, when the out-of-baked steel plate detection element detects the presence of steel signal, it searches whether there is a steel plate that meets the first condition, specifically including: when the out-of-baked steel plate detection element detects the presence of steel signal, the position information of the out-of-baked steel plate detection element is compared with the position information of each steel plate (it can be the first steel plate to the last steel plate j that needs to be taken out of the quenching furnace, or it can be the information of all steel plates that have not been taken out of the furnace, etc.) to search whether there is a steel plate that meets the first condition.

[0176] The position information of the out-of-furnace steel plate detection element is compared with the position information of each steel plate, specifically including: comparing the position information of the out-of-furnace steel plate detection element with the position information of each steel plate in sequence from the first steel plate to the last steel plate j in the order of out-of-furnace. The first steel plate refers to the front steel plate, i.e., the first steel plate to be out of the furnace.

[0177] In some embodiments, see Figure 6 The position coordinate (value) increases gradually along the transmission direction of the steel plate. One end of the steel plate along its transmission direction is the head end, and the other end is the tail end.

[0178] In some embodiments, when an alarm is abnormal, the furnace unloading is stopped and the whole furnace swing mode is entered and the furnace loading is stopped.

[0179] In some embodiments, if a steel plate that meets the first condition is not found, the abnormal situation is confirmed, such as whether the steel plate position is abnormal or the steel plate detection element is abnormal. If the steel plate position is abnormal, the steel plate position is corrected. If the steel plate signal is lost, a new steel plate signal is inserted. If the steel plate detection element is abnormal, the steel plate detection element detection signal is processed.

[0180] Generally, there may be interference, and the detection signal of the steel plate detection element needs to be processed, specifically including: delay processing of the detection signal of the steel plate detection element.

[0181] When judging whether the steel plate position is normal, if the calculated steel plate position is X1 (such as 28000mm), and the grating at the X2 position (such as 29800mm) is lit, it means that the steel plate position is calculated incorrectly, which means that the steel plate position is abnormal.

[0182] The position of the steel plate is corrected. One embodiment is: if the correction range is within the set range (such as 2m), then the correction is made. For example, 29800-28000=1800mm, which is within 2m, then the position of the steel plate will be corrected to X2 (such as 29800mm).

[0183] In some embodiments, if there is no steel plate signal but the grating is lit, it proves that the signal of the steel plate is lost.

[0184] In some embodiments, inserting a new steel plate signal specifically includes: inputting the current position, length, thickness and other signals of the steel plate on the HMI, and after confirmation, the HMI will add a steel plate. For example, when there are 2 steel plates on the human-machine interface, if the operator wants to insert a steel plate information (the actual object must be 3), the current position, length, thickness and other signals of the steel plate need to be input on the HMI, and after confirmation, the HMI will add a steel plate.

[0185] In some embodiments, after finding a steel plate that meets the first condition, it is necessary to determine whether the steel plate meets the furnace discharge condition. If so, the furnace discharge procedure of the steel plate is started;

[0186] When the steel plate is in normal position, the quenching machine is normal, the water pressure of the quenching machine is normal, the actual water flow of the nozzle reaches the set water flow, and the furnace roller table operates normally, it is considered that the steel plate meets the furnace discharge conditions.

[0187] The above scheme of the present invention can prevent unknown steel plates from being discharged from the furnace, and can more effectively prevent abnormal discharge of steel plates, thereby improving the production efficiency, safety and stability of the unit. The present invention has a significant effect after being put into use, and can effectively prevent red steel from being discharged from the furnace, greatly improve production efficiency, and make the unit safer and more stable.

[0188] The above process is described in detail below through a specific example.

[0189] Before leaving the furnace, gratings 1 to 2 are arranged in sequence, a total of 2 gratings, located in front of the quenching machine at the furnace. Of course, the present invention is not limited to 2 gratings before leaving the furnace, but can also be 1 grating or 3 gratings, etc. Preferably, 2 gratings are used.

[0190] When the grating detects a steel signal, it is compared with the position information of the steel plate here. If the grating position is within the steel plate position area, it is considered normal and the furnace is discharged normally. Otherwise, the program outputs an abnormal steel plate position signal and sends a signal to the operator to stop the furnace discharge and enter the full furnace swing mode. The operator is required to confirm whether the steel plate position or the grating is incorrect. If the steel plate position is incorrect, the steel plate position is corrected. If the steel plate signal is lost, a new steel plate signal is inserted. If the grating is incorrect, the grating detection signal is processed.

[0191] Prevent unknown steel plates from being discharged from the furnace, specifically: grating signal processing, generally with a delay of 1 second; find the steel plate here, execute the loop, and find the steel plate that meets the position: if the tail position of the steel plate -1000 (such as 1 meter, set as needed) < the grating (phototube) position < the head position of the steel plate +1000 (such as 1 meter, set as needed), if a steel plate that meets this condition is found, it means that the grating signal is normal, and the normal discharge procedure is carried out, otherwise an alarm prompts: the steel plate signal or the grating signal may be abnormal, the discharge is stopped, the whole furnace is swung and the entry into the furnace is stopped.

[0192] The steel plate must meet the conditions to be discharged from the furnace, specifically: when the steel plate position is normal, the quenching machine is normal, the quenching machine water pressure is normal, the actual water flow of the nozzle reaches the set water flow, and the furnace roller table operates normally, the steel plate will be discharged from the furnace normally.

[0193] Embodiment 6

[0194] See also Figure 4 and Figure 5 The present invention also discloses a method for controlling steel plate entering a furnace, comprising the following steps:

[0195] Acquire the signal of the detection element of the steel plate entering the furnace;

[0196] When the steel plate detection element detects a steel signal, it searches for a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the steel plate detection element ≤ the head position of the steel plate + A, where A is the set allowable deviation value;

[0197] If a steel plate that meets the first condition is found, a normal signal is returned (indicating that the signal of the detection element of the steel plate entering the furnace is normal), the search is exited, and the furnace entry procedure is started;

[0198] If no steel plate meeting the first condition is found, an abnormal signal is returned, an alarm is sounded to indicate the abnormality, and the steel plate is stopped from entering the furnace.

[0199] Furthermore, when the steel plate detection element detects the presence of steel, signal processing is performed, generally with a delay of a set time (eg, 1 second).

[0200] The position information of each steel plate (the head and tail positions of the steel plate) is calculated by the program. For example, the initial position of each steel plate is known, and its position at the corresponding time is obtained by integrating the speed and time. Of course, this position is theoretical, and the calculated position can also be corrected by the grating.

[0201] The steel plate detection element is arranged in front of the heating furnace entrance. The steel plate detection element is used to detect the steel plate on the furnace roller.

[0202] In some embodiments, there are multiple steel plate detection elements entering the furnace, and the multiple steel plate detection elements entering the furnace are spaced apart along the direction in which the steel plate enters the furnace. The spacing between adjacent steel plate detection elements entering the furnace is set as required. In some embodiments, the spacing between the steel plate detection element entering the furnace and the entrance of the heating furnace is generally less than 1 meter, such as the steel plate detection element entering the furnace is generally located within 1 meter of the entrance of the heating furnace.

[0203] In some embodiments, the steel plate detection element adopts a grating (opposite beam grating).

[0204] In some embodiments, when the steel plate detection element entering the furnace detects the presence of steel signal, it searches whether there is a steel plate that meets the first condition, specifically including: when the steel plate detection element entering the furnace detects the presence of steel signal, the position information of the steel plate detection element entering the furnace is compared with the position information of each steel plate (it can be the first steel plate to the last steel plate j that needs to enter the furnace on the furnace roller, or it can be the information of all steel plates that have not entered the furnace, etc.) to search whether there is a steel plate that meets the first condition.

[0205] The position information of the steel plate detection element entering the furnace is compared with the position information of each steel plate, specifically including: comparing the position information of the steel plate detection element with the position information of each steel plate in sequence according to the order in which the steel plates enter the furnace.

[0206] In some embodiments, if no steel plate meeting the first condition is found, the abnormal situation is confirmed; if the position of the steel plate is abnormal, the position of the steel plate is corrected; if the steel plate signal is lost, a new steel plate signal is inserted; if the steel plate detection element entering the furnace is abnormal, the detection signal of the steel plate detection element entering the furnace is processed.

[0207] Generally, there may be interference, and the detection signal of the steel plate detection element needs to be processed, specifically including: delay processing of the detection signal of the steel plate detection element.

[0208] When judging whether the steel plate position is normal, if the calculated steel plate position is X1 (such as 28000mm), and the grating at the X2 position (such as 29800mm) is lit, it means that the steel plate position is calculated incorrectly, which means that the steel plate position is abnormal.

[0209] The position of the steel plate is corrected. One embodiment is: if the correction range is within the set range (such as 2m), then the correction is made. For example, 29800-28000=1800mm, which is within 2m, then the position of the steel plate will be corrected to X2 (such as 29800mm).

[0210] In some embodiments, if there is no steel plate signal but the grating is lit, it proves that the signal of the steel plate is lost.

[0211] In some embodiments, inserting a new steel plate signal specifically includes: inputting the current position, length, thickness and other signals of the steel plate on the HMI, and after confirmation, the HMI will add a steel plate. For example, when there are 2 steel plates on the human-machine interface, if the operator wants to insert a steel plate information (the actual object must be 3), the current position, length, thickness and other signals of the steel plate need to be input on the HMI, and after confirmation, the HMI will add a steel plate.

[0212] Further, see Figure 7 After finding a steel plate that meets the first condition, it is necessary to determine whether the distance S between the last steel plate in the current furnace (i.e., the steel plate that entered the furnace before this steel plate) and the furnace entrance meets the requirement that this steel plate enters the furnace at high speed and decelerates to the process speed V. 工艺 If the required distance is met, the furnace entry procedure for the steel plate is started.

[0213] In one embodiment, S must meet the following conditions:

[0214]

[0215] Among them, V 入 is the speed of steel plate entering the furnace, l 入 It indicates the length of the steel plate currently ready to enter the furnace. S0 is the safety interval, which is set according to needs and is generally 1m-2m.

[0216] The above scheme of the present invention can prevent unknown steel plates from entering the furnace, and can effectively prevent steel plates from being abnormally discharged from the furnace, thereby improving the production efficiency, safety and stability of the unit. The present invention has a significant effect after being put into use, and can effectively prevent red steel from being discharged from the furnace, greatly improve production efficiency, and make the unit safer and more stable.

[0217] The above process is described in detail below through a specific example.

[0218] At the furnace entrance, gratings 1 to 3 are arranged in sequence, a total of 3 gratings, located before entering the furnace. Of course, the present invention is not limited to arranging 3 gratings before entering the furnace, but can also be 1 grating, 2 gratings, 4 gratings, etc. Preferably, 3 gratings are used.

[0219] When the grating detects a steel signal, it is compared with the position information of the steel plate here. If the grating position is within the steel plate position area, it is considered normal and the furnace is loaded normally; otherwise, the program outputs an abnormal steel plate position signal and sends a signal to the operator to stop loading into the furnace.

[0220] Prevent unknown steel plates from entering the furnace: Specifically: grating signal processing, generally with a delay of 1 second; find the steel plate here, execute the loop, and find the steel plate that meets the position: if the tail position of the steel plate -1000 < photoelectric tube position < head position of the steel plate +1000, if a steel plate that meets this condition is found, it means that the grating signal is normal, then the normal furnace entry procedure is carried out, otherwise an alarm prompts: the steel plate signal or grating signal may be abnormal, and the furnace entry is stopped.

[0221] The invention has a remarkable effect after being put into use, can effectively prevent red steel from coming out of the furnace, greatly improves production efficiency, and at the same time makes the unit safer and more stable.

[0222] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method for a hot-rolled steel plate shot blasting unit, characterized in that: include: Determine whether the unit meets the automatic operation preparation conditions. If so, perform the following steps: Send the steel plate information to the first suction cup crane; Determine whether there is a steel plate on the roller of the unit, wherein the roller of the unit includes a first roller, a shot blasting roller and a second roller, the feeding end of the shot blasting roller is connected to the first roller, and the discharging end of the shot blasting roller is connected to the second roller; When there is no steel plate on the roller table of the unit, a first control instruction is output to the first suction cup crane, and the first control instruction is configured to, when executed, cause the first suction cup crane to place the adsorbed steel plate on the first roller table, and automatically return to the loading area after placing the plate; Receiving the inserted steel plate information transmitted by the first suction cup crane, after receiving the inserted steel plate information transmitted by the first suction cup crane, outputting a second control instruction to the first roller, the shot blasting roller, and the second roller, and outputting a third control instruction including a set shot blasting speed and a real-time position of the steel plate to the shot blasting machine, wherein the second control instruction is configured to, when executed, make the first roller, the shot blasting roller, and the second roller run at their respective set first speeds, and the third control instruction is configured to, when executed, make the shot blasting machine control the flow rate and speed of the shot blasting based on the set shot blasting speed and the real-time position of the steel plate; A blowing device is added to the outlet of the shot blasting machine, and the control method of the blowing device includes the following steps: Get the number of steel plates n of the unit; Determine whether n is 0; If n=0, the mark position corresponding to the blowing device is set to the first value; If n>0, the loop is started: the loop variable i=1 is initialized, and it is determined whether the position of the i-th steel plate meets the first condition, which is that the tail position of the steel plate - B ≤ the position of the blowing device ≤ the head position of the steel plate + B, where B is the set allowable deviation value; If the position of the i-th steel plate does not meet the first condition, determine whether i is less than n. If not, set the flag position corresponding to the blowing device to the first value and exit the loop. If yes, then i+1 is added to continue the determination of the next steel plate. If the position of the i-th steel plate meets the first condition, the mark position corresponding to the blowing device is set to the second value, and the cycle ends; When the flag bit corresponding to the blowing device is the second value, the blowing device is controlled to start; When the flag bit corresponding to the blowing device is the first value, the blowing device is controlled to stop.

2. The control method of the hot rolled steel plate shot blasting unit according to claim 1, characterized in that: The preparation conditions for automatic operation of the unit include that the steel plate parameters have been entered, the first roller, shot blasting roller, and second roller drives are ready, the first suction cup crane is in automatic mode, and the shot blasting machine is in automatic mode.

3. The control method of the hot rolled steel plate shot blasting unit according to claim 1, characterized in that: When it is recognized that the steel plate reaches the set position on the second roller, the second roller is controlled to stop, and the data information of the steel plate is sent to the second suction cup crane; After receiving the data information of the steel plate sent by the unit controller, the second suction cup crane automatically moves to the set position to absorb the steel plate on the second roller and then places it in the finished product area.

4. The control method of the hot rolled steel plate shot blasting unit according to claim 3, characterized in that: When the second suction cup crane absorbs the steel plate and leaves the second roller table a set distance, it will send feedback information to the unit controller. After receiving the feedback information sent by the second suction cup crane, the unit controller will delete the signal of the steel plate and return to the initial state.

5. The control method of the hot rolled steel plate shot blasting unit according to any one of claims 1 to 4, characterized in that: When it is recognized that the tail of the steel plate leaves the shot blasting area, the second roller is controlled to accelerate to the set second speed; or / and, When the first suction cup crane places the adsorbed steel plate on the first roller and leaves the first roller by a set distance, the first suction cup crane transmits the steel plate insertion information to the unit controller; or / and, The first suction cup crane receives the steel plate information sent by the unit controller and absorbs the steel plate from the loading area; or / and, When there are steel plates on the roller table of the unit, the first suction cup crane continues to wait in the loading area; or / and, When there is no steel plate on the roller table of the unit, the first roller table, the shot blasting roller table and the second roller table are stopped.

6. A control system for a hot-rolled steel plate shot blasting unit, characterized in that: It comprises a unit controller, in which a control program of the hot-rolled steel plate shot blasting unit is arranged, and the control program of the hot-rolled steel plate shot blasting unit is configured to implement the control method of the hot-rolled steel plate shot blasting unit as claimed in any one of claims 1 to 5.

7. The control system of the hot rolled steel plate shot blasting unit according to claim 6, characterized in that: It also includes a first roller frequency converter, a shot blasting roller frequency converter and a second roller frequency converter. The first roller frequency converter and the second roller frequency converter are connected to the unit controller, the shot blasting roller frequency converter is connected to the shot blasting machine controller, the shot blasting machine controller is connected to the unit controller, the first roller frequency converter is connected to the first roller motor, the second roller frequency converter is connected to the second roller motor, and the shot blasting roller frequency converter is connected to the shot blasting roller motor.

8. The control system of the hot rolled steel plate shot blasting machine according to claim 6, characterized in that: It also includes a suction cup crane controller for controlling the suction cup crane, and the suction cup crane controller is connected to the unit controller.

9. A steel plate heat treatment production line, characterized in that: It includes a unit controller, a shot blasting machine, a first suction cup crane, and a first roller, a shot blasting roller, and a second roller arranged in sequence, and a blowing device located between the shot blasting roller and the second roller of the shot blasting machine, wherein the blowing device is connected to the unit controller, and the unit controller is provided with a control program of the hot-rolled steel plate shot blasting unit, and the control program of the hot-rolled steel plate shot blasting unit is configured to implement the control method of the hot-rolled steel plate shot blasting unit as described in any one of claims 1 to 5.

10. The steel plate heat treatment production line according to claim 9, characterized in that: It also includes a quenching furnace and / or a second suction cup crane and a steel plate detection device. The quenching furnace is arranged at the discharge end of the second roller conveyor, and the shot-blasted steel plate is transported to the quenching furnace through the second roller conveyor; The steel plate detection device is used to identify whether the steel plate has reached the set position on the second roller. When it is identified that the steel plate has reached the set position on the second roller, the unit controller is used to control the second roller to stop and send data information of the steel plate to the second suction cup crane; The second suction cup crane is used to receive the data information of the steel plate sent by the unit controller, automatically run to the set position to absorb the steel plate on the second roller and then place it in the finished product area; When the second suction cup crane absorbs the steel plate and leaves the second roller table a set distance, it will send feedback information to the unit controller. After receiving the feedback information sent by the second suction cup crane, the unit controller will delete the signal of the steel plate and return to the initial state.

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